diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index e72f05c3bef09258311f7192afb179a10657c450..fcc16e4349df9f3353ac03f975d9c1be9938863a 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -1539,6 +1539,7 @@ static int convert_to_probe_trace_events(struct perf_probe_event *pev, goto error; } tev->point.offset = pev->point.offset; + tev->point.retprobe = pev->point.retprobe; tev->nargs = pev->nargs; if (tev->nargs) { tev->args = zalloc(sizeof(struct probe_trace_arg) diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index 525136684d4ec170201b4d07c7b080b73851edf9..9b0e1b1f975579e7ef9b73d4f834d34e4e75a11d 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -783,6 +783,16 @@ static int convert_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf) /* This function has no name. */ tev->point.offset = (unsigned long)pf->addr; + /* Return probe must be on the head of a subprogram */ + if (pf->pev->point.retprobe) { + if (tev->point.offset != 0) { + pr_warning("Return probe must be on the head of" + " a real function\n"); + return -EINVAL; + } + tev->point.retprobe = true; + } + pr_debug("Probe point found: %s+%lu\n", tev->point.symbol, tev->point.offset);